Electric-car truck



E. LUNDQVIST` ELECTRIC GAR TRUCK.

A Patented Mar. 24, 1896.

INVENTOR WiTNESSES: m

ANDREW BLRANAM. PHUYUUTHQWASHKEYUN i12.

UNITED STATES PATENT OFFICE.

EMIL LUNDQVIST, OF PITTSBURG, PENNSYLVANIA.

ELECTRIC-CAR TRUCK.

SPECIFICATION forming part of Letters Patent NO. 556,893, dated 'March24, 1896. Application filed July 3l, 1895. Serial No. 557,700. (Nomodel.)

To all whom it may concern:

Be it known that I, EMIL L'UNDQVIST, a subject of the King of Sweden andNorway, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inElectric-Car Trucks, of which the following is a full, clear, and exactdescription.

This invention relates to electric locomotive and car trucks, the objectbeing to provide a method of mounting the propelling motor or motorswhich will prevent injury to them and to the gearing connecting the samewith the axle or axles due to constant hammering and vibration fromrunning over the rail-joints or any obstruction which may be in the way.

l propose to support the motor or motors and the gearing, including thewheel, which is usually carried directly upon the axle, entirely uponthe truck-frame and provide a ilexible joint between the axle and thegearing of such construction that a movement in any direction of theaxle caused by jolting or hammering upon the rails will not becommunicated to the gearing or motors.

The invention will be described in detail with reference to theaccompanying drawings, in which- Figure l is a plan of a car orlocomotive truck, showing two motors mounted thereon and gearedrespectively7 to two axles. Fig. 2 is a side elevation of the same.

Referring to the drawings by letter, A A represent the two axles, towhich are respectively geared two electric motors B B. l mount thesemotors solely upon the truckframein any desired manner. The way shown inthe drawings consists in providing the truck-frame C with twocross-beams c c, respectively, located between the axles and at theirends resting between springs c2 and c3 placed above and below andlocated in boxes cl attached to the truck-frame, as shown. Upon thesecross-beams rest two bars d and d',being secured thereto by means ofbrackets c having openings through which the bars pass and in which theyare secured by means of pins e. These bars are placed a distance apartabout equal to the width of the motor, and each end of the bars isprovided with two holes which pass over two pins or lugs t and b fixedor formed in the ends or heads of the motor-frames. Each motor istherefore coniined between the ends of the two bars, and it is rigidlysupported in place by reason of the engagement of the pins and holes.The motors are supported with their armature-shafts b2 parallel to theaxles. The motor-frame has cast upon or otherwise. attached to it thebracket f, containing a bearing for a sleeve g. The sleeve surrounds theaxle, but its internal diameter is considerably greater than thediameter of the axle, so that a cylindrical space g' will remain betweenthe axle and the sleeve. On the end of the sleeve is cast or otherwiseattached a gear-wheel g2, which meshes with the pinion b3 on thearmatureshaft. From this construction it will be observed that therotary motion of the armature is transmitted to the sleeve, and thelatter turns in the bearing f without contact with the axle. The end ofthe sleeve opposite the gear-wheel is made square or of other polygonalshape exteriorly and the faces are made convex in the direction of thelength of the sleeve, as shown at h. This end of the sleeve passes intothe end of another sleeve, 11, which has a polygonal opening or socket,corresponding in shape to the end of sleeve g, but its faces are madeplain instead of curved. This Second sleeve is also made of greaterdiameter than the axle, and for convenience of construction it is madein two parts secured together by bolts i'. The other end of sleeve c' isalso formed with a polygonal-shaped socket to iit over acorresponding-shaped collar j keyed securely upon the axle. The collarhas the same curved surface before described, and it also is made in twoparts bolted together, as shown. This construction provides a iiexiblejoint between the collar and sleeve i and another between sleeve t' andsleeve g, permitting of considerable movement of the axle in anydirection without altering the position of the motor or gearing andwithout exerting any strain upon either of them. At the same time therotary motion of the gearing is positively transmitted to the axle byreason of the polygonal shape of the flexible joint.

Vhen one motor is used or when the mo tors are mounted independently ofeach other, the bars CZ CZ rest on cross-pieces on each side of the axleand pass above the axle. The

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method of mounting two motors herein illustrated is a good one, becausethey are balanced one against the other and the Weight of both is evenlydistributed, making the traction the same on both axles. The bars d andd constitute a frame supported between its extremities upon thetruck-frame and carrying a motor at each end.

Having thus described my invention, I claim- In an electric locomotive,the combination of a motor solely supported on the truckframe, agear-Wheel rotatively mounted in a bearing in the motor-frame and inmesh With

